Ultrasonic melt processing in the low pressure investment casting of Al alloys

被引：40
作者：
Barbosa, J. [1 ]
Puga, H. [1 ]
机构：
[1] Univ Minho, CMEMS, Azurem, P-4800058 Guimaraes, Portugal
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2017年 / 244卷
关键词：
Aluminum alloys; Investment casting; Refinement; Ultrasound; Low-pressure; MECHANICAL-PROPERTIES; MICROSTRUCTURE; BEHAVIOR; TENSILE;
D O I：
10.1016/j.jmatprotec.2017.01.031
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
AlSi7Mg investment cast test bars were produced using low-pressure die casting and ultrasonically refined during cooling. The microstructure and mechanical properties of the samples at different distances from the acoustic radiator were characterized for 650 degrees C pouring temperature. The combined technique lead to cast samples free from gas porosities and solidification defects, promoted the formation of small alpha-Al globular grains, modified the eutectic silicon, dispersed and decreased the size of intermetallic phases. The alloy mechanical properties were improved, increasing the ultimate tensile strength, yield strength and strain. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：150 / 156
页数：7
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